package file

import (
	"errors"
	"mime/multipart"
	"strings"

	"gin-vue-admin/server/global"
	"gin-vue-admin/server/model/common/request"
	"gin-vue-admin/server/model/example"
	"gin-vue-admin/server/utils/upload"
)

// Upload
// @function: Upload
// @description: 创建文件上传记录
// @param: file model.ExaFileUploadAndDownload
// @return: error
func (e *FileUploadAndDownloadService) Upload(file example.ExaFileUploadAndDownload) error {
	return global.Db.Create(&file).Error
}

// FindFile
// @description: 查询文件记录
// @param: id uint
// @return: model.ExaFileUploadAndDownload, error
func (e *FileUploadAndDownloadService) FindFile(id uint) (example.ExaFileUploadAndDownload, error) {
	var file example.ExaFileUploadAndDownload
	err := global.Db.Where("id = ?", id).First(&file).Error
	return file, err
}

// DeleteFile
// @function: DeleteFile
// @description: 删除文件记录
// @param: file model.ExaFileUploadAndDownload
// @return: err error
func (e *FileUploadAndDownloadService) DeleteFile(file example.ExaFileUploadAndDownload) (err error) {
	var fileFromDb example.ExaFileUploadAndDownload
	fileFromDb, err = e.FindFile(file.ID)
	if err != nil {
		return
	}
	oss := upload.NewOss()
	if err = oss.DeleteFile(fileFromDb.Key); err != nil {
		return errors.New("文件删除失败")
	}
	err = global.Db.Where("id = ?", file.ID).Unscoped().Delete(&file).Error
	return err
}

// EditFileName 编辑文件名或者备注
func (e *FileUploadAndDownloadService) EditFileName(file example.ExaFileUploadAndDownload) (err error) {
	var fileFromDb example.ExaFileUploadAndDownload
	return global.Db.Where("id = ?", file.ID).First(&fileFromDb).Update("name", file.Name).Error
}

// GetFileRecordInfoList
// @function: GetFileRecordInfoList
// @description: 分页获取数据
// @param: info request.PageInfo
// @return: list interface{}, total int64, err error
func (e *FileUploadAndDownloadService) GetFileRecordInfoList(info request.PageInfo) (list interface{}, total int64, err error) {
	limit := info.PageSize
	offset := info.PageSize * (info.Page - 1)
	keyword := info.Keyword
	db := global.Db.Model(&example.ExaFileUploadAndDownload{})
	var fileLists []example.ExaFileUploadAndDownload
	if len(keyword) > 0 {
		db = db.Where("name LIKE ?", "%"+keyword+"%")
	}
	err = db.Count(&total).Error
	if err != nil {
		return
	}
	err = db.Limit(limit).Offset(offset).Order("updated_at desc").Find(&fileLists).Error
	return fileLists, total, err
}

// UploadFile
// @function: UploadFile
// @description: 根据配置文件判断是文件上传到本地或者七牛云
// @param: header *multipart.FileHeader, noSave string
// @return: file model.ExaFileUploadAndDownload, err error
func (e *FileUploadAndDownloadService) UploadFile(header *multipart.FileHeader, noSave string) (file example.ExaFileUploadAndDownload, err error) {
	oss := upload.NewOss()
	filePath, key, uploadErr := oss.UploadFile(header)
	if uploadErr != nil {
		panic(uploadErr)
	}
	s := strings.Split(header.Filename, ".")
	f := example.ExaFileUploadAndDownload{
		Url:  filePath,
		Name: header.Filename,
		Tag:  s[len(s)-1],
		Key:  key,
	}
	if noSave == "0" {
		return f, e.Upload(f)
	}
	return f, nil
}
